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src/views/InstructorView.js

@@ -342,7 +342,11 @@ export function setupInstructorEvents() {
     function cleanText(str, isCode = false) {
         if (!str) return '';
 
-        // 1. Normalize line endings
+        // 1. Convert HTML entities if present (common in innerHTML injection flows)
+        str = str.replace(/ /g, ' ');
+        str = str.replace(/<br\s*\/?>/gi, '\n');
+
+        // 2. Normalize line endings
         str = str.replace(/\r\n/g, '\n');
 
         if (isCode) {
@@ -355,8 +359,11 @@ export function setupInstructorEvents() {
 
             let minIndent = null;
             for (const line of lines) {
-                if (line.trim().length === 0) continue;
-                const currentIndent = line.match(/^\s*/)[0].length;
+                // Determine indent level
+                const content = line.replace(/^[\s\u3000\u00A0]+/, '');
+                if (content.length === 0) continue; // Skip empty/whitespace-only lines
+
+                const currentIndent = line.length - content.length;
                 if (minIndent === null || currentIndent < minIndent) {
                     minIndent = currentIndent;
                 }
@@ -369,7 +376,7 @@ export function setupInstructorEvents() {
         } else {
             // Aggressive Flatten for Text Prompts (Force Left Align)
             return str.split('\n')
-                .map(line => line.trimStart()) // Remove ALL leading space from every line
+                .map(line => line.replace(/^[\s\u3000\u00A0]+/g, '')) // Regex remove ALL leading whitespace (Space, Tab, FullWidth, NBSP)
                 .filter((line, index, arr) => {
                     // Remove leading/trailing empty lines
                     if (line.trim() === '' && (index === 0 || index === arr.length - 1)) return false;